Update UI for extension destinations in print preview destination list

chrome/browser/ui/webui/print_preview/print_preview_ui.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/ui/webui/print_preview/print_preview_ui.h"
 
 #include <map>
 #include <vector>
 
 #include "base/id_map.h"
@@ skipping 306 matching lines @@
       "noDestsPromoAddPrinterButtonLabel",
       IDS_PRINT_PREVIEW_NO_DESTS_PROMO_ADD_PRINTER_BUTTON_LABEL);
   source->AddLocalizedString(
       "noDestsPromoNotNowButtonLabel",
       IDS_PRINT_PREVIEW_NO_DESTS_PROMO_NOT_NOW_BUTTON_LABEL);
   source->AddLocalizedString("couldNotPrint",
                              IDS_PRINT_PREVIEW_COULD_NOT_PRINT);
   source->AddLocalizedString("registerPromoButtonText",
                              IDS_PRINT_PREVIEW_REGISTER_PROMO_BUTTON_TEXT);
   source->AddLocalizedString(
+      "extensionDestinationIconTooltip",
+      IDS_PRINT_PREVIEW_EXTENSION_DESTINATION_ICON_TOOLTIP);
+  source->AddLocalizedString(
       "advancedSettingsSearchBoxPlaceholder",
       IDS_PRINT_PREVIEW_ADVANCED_SETTINGS_SEARCH_BOX_PLACEHOLDER);
   source->AddLocalizedString("advancedSettingsDialogTitle",
                              IDS_PRINT_PREVIEW_ADVANCED_SETTINGS_DIALOG_TITLE);
   source->AddLocalizedString(
       "noAdvancedSettingsMatchSearchHint",
       IDS_PRINT_PREVIEW_NO_ADVANCED_SETTINGS_MATCH_SEARCH_HINT);
   source->AddLocalizedString(
       "advancedSettingsDialogConfirm",
       IDS_PRINT_PREVIEW_ADVANCED_SETTINGS_DIALOG_CONFIRM);
@@ skipping 305 matching lines @@
 }
 
 void PrintPreviewUI::SetSelectedFileForTesting(const base::FilePath& path) {
   handler_->FileSelected(path, 0, NULL);
 }
 
 void PrintPreviewUI::SetPdfSavedClosureForTesting(
     const base::Closure& closure) {
   handler_->SetPdfSavedClosureForTesting(closure);
 }